Convert Avahi backend to dbus-next

The dbus-native and avahi-dbus packages seem to be unmaintained and
depend on some packages with known security issues. dbus-next is an
active fork of dbus-native.

Author: dlech

package-lock.json

@@ -443,10 +443,9 @@
         "vscode-test": "^1.3.0"
     },
     "dependencies": {
-        "avahi-dbus": "^0.1.0",
         "bonjour": "^3.5.0",
         "compare-versions": "^3.0.1",
-        "dbus-native": "^0.2.2",
+        "dbus-next": "~0.8.2",
         "ssh2": "~0.5.5",
         "ssh2-streams": "~0.1.19",
         "temp": "^0.8.3",